You can enter the neutral zone as long as you get back before they snap that ball.
I know that. I wasn't talking about that play in particular from earlier were like 2-3 'boys jumped and got back. I am talking about when D-lineman are trying to guess the snap count and the lunge over as the ball is being snapped. It does work sometimes, but it is close enough that it should be watched more carefully, because that is a tremedous advantage for a defender to cross early.
Ah. I see what you're saying.